I too have been receiving these unwanted calls. and i just don't answer them. they seem to be on a timer of some sort. sometimes it is as late as after 8 pm.
All of this week I have been receiving calls up to three times a day from AICR 202 607 2813. Interestingly in reviewing the pattern I noticed the mid day call had the name Shanetta Harve in the caller I.D. box in place of AICR. I do not pick up calls I don't know and I have learned not to even call the number as that may trigger an unwanted tag to your phone somehow. Once I attempted to call my phone provider and the police with a more menacing phone caller problem. Each told me it was the responsibility of the other to take care of the problem. Neither my phone provider nor my local police were willing to deal with phone related harassment in any way shape or form. The best thing to do is don't answer it and never call the number back. Also never put your voice on a personal greeting, use the pre-recorded voice supplied by the service. You may want to limit the number of rings on your phone to the minimum and lower the volume on the extensions in your home.
I too have been receiving these unwanted calls. and i just don't answer them. they seem to be on a timer of some sort. sometimes it is as late as after 8 pm.